Mining apparatus



Dec. 23, 1930. c. F. osGooD MINING APPARATUS 2 Sheets-Sheet 1 Filed 001:. 9, 1926 Ogyaad java/0607". GimrZes 1- A.

Dec. 23, 1930. c. 059005 1,786,259

' MINING APPARATUS Filed OCt- 9. 1926 2 Sheets-Sheet 2 Patented Dec. 23, 1930 UNITED STATES. PATENT oFFicE;

CHARLES F. oseoon, or crinnnivionr, new namsm'm, AssIGNon. TO SULLIVAN MA- CHINERY. COMPANY, a conronn'rron or MASSACHUSETTS MINING APPARATUS l lpplicationfiled October e, 1926. Serial no. 140,579.

This invention relates to mining apparatus and more particularly to a mining machine of the shear cutter type adapted to operate from the mine trackw'ay.

An object of this invention is to provide an improved mining machine of the wheel I mounted type wherein the mining machine is 'adaptedto inserta shear or vertical cut in the-coal face while mounted on the mine trackway. Another object of this invention is to provide an improved shearing machine having a pivoted cutter bar and improved and simplified mechanism for swinging the cutter bar aboutits'pivot. "A still further object of this invention is to provide an improved shearing machine having improved mechanism for driving the wheelsof the truck. Yet another object of this invention is to provide an improved shearing machine having improved bar swinging mechanism and truck driving mechanism both driven from the motor driven plural speed transmission mechanism of the machine, These and other objects of my invention will, however, subsequently more fully appear.

In the accompanying drawings 1. have shown for purposes of illustration oneform which my invention may assume in practice.

In these drawings, i

Fig. 1 is a side elevation of the improved shearing machine, the cutter bar and swinging' connections therefor being shown in a plurality of positions as indicated by dotted lines.

Fig. 2 is a plan view of the machineshown inFig.1..

Fig. 3 is a transverse horizontal sectional view taken on line 3-3 of Fig. 1;

Fig. 4 is a central longitudinally extending transverse sectional view taken on line 44= of Fig. l. I Y

Figs 5 is a developed transverse sectional view taken on line 55 of Fig. 1.

Fig. -6 is a detail sectional view illustratinga portionoii the barswinging mechanism, 7

trackwa-y .3 in the usual-manner. The truck "frame 1 specifically comprises parallel longitudinally extending angle members 4 held in rigid spaced relation by means of transverse plates 5, the latter being spaced longi tudinally of thetrucl: frame 1. The angle members carry in a suitable manner the runv hing gear of the truck wheels 2; i As shown,

a mining machine generally designated 6 is mounted-on the truck andincludes a generally rectangular elongated machine frame or body 7 rlgldlysecured to the angle members i and plates?) of the truck frame. Further,

the machine body 7 has pivotally mounted thereon an elongated plane cutter bar 8 movable ina vertical plane and abcutthe outer edges oi which an endless cutter bit carrying cutter chain 9 is adapted to be circulatechthe cutter chain orbit fixed by said bar. The cut- "terchain is adapte'd'to be-driven .by means of ausual drive sprocket 10 as clearly shown in 5. The cutter chain drive sprocket 10 disposed at the front end of the machine frame 7 and is rotatable about ahorizontal axisextendin transversely of the machine frame. As shown,

one Morris P. Holmes Ser. No. 619,839,,filed' Feb. 19, 1923, the mining machine 6 being of the same general type, as that disclosed in the above mentioned application. As the specific driving connections between the motor and thecutter chain drive sprocket 10 do not enter into this invention, further detailed description of the same is deemed unnecessary other thanjto' state that the sprocket 10 may be either connected to or disconnected from the motor at will. p

1n specifically describing the improved the elongated cutter bar; 8 is pivoted :as atfll on an {1X13 coincident mechanism for swinging the cutter bar 8 about its pivot 11, it will herein be observed that the rear end of the armature shaft of the driving motor (see Fig. 4) has suitably secured thereto a spur pinion 16 which is adapted to drive the truck wheel driving mechanism and the improved mechanism for swinging the cutter bar about its pivot and includes transmission gearing and controlling clutches, substantially similar to those described in the pending application mentioned above, at a slow speed in one direction or at a fast speed in the opposite direction without reversing the motor. In specifically describing the fast feed transmission mechanism, it will be noted that pinion 16 meshes with a spur gear 17 suitably journaled within bearings 18 carried by the machine frame 7. The gear 17 has secured thereto and rotatable therewith a spur pinion 19 which meshes with a larger internal gear 20. The hub 21 of the gear is herein also ournaled on a suitable bearing sleeve 22 on a sleeve clutch member 23 keyed as at 24 to a longitudinally disposed horizontal main gear drivingor transmission shaft 25 journaled at its opposite ends in suitable bearings 26 and 27 suitably carried within the machine frame Moreover, it will be noted that the clutch member 23 carries a series of friction clutch discs 28 which are interleaved with a corresponding series of clutch discs 29 carried by the sieeve of the internal gear 20. As shown, the sleeve of this internal gear is also provided with a plurality of radiall I located longitudinally extending slots 30 receiving radial fingers 31 formed on an interlocking member keyed to the hub of a pinion 33 freely rotatable on the shaft interposed between these lingers 31 are friction clutch operating fingers carried an axially movable cvlindrical plane clutch operating member 35 disposed coaxially with and encircling the hub of the member These lingers extend longitudinally nto contact with the adjacent end clutch disc he clutch 23, 29. As shown, the rear end the sl aft 25 has secured thereto as by a key a s ar pinion which meshes with a spur c iournaled within suitable bearings 9 carried by the machine frame. T he spur ear 38 has secured thereto and rotatable tlerewitn a spur pinion 40 which meshes with a larger internal gear 41 keyed as at 42 to a longitudinally extending horizontal shaft 43 disposed coaXi-ally with the transmission shaft The shaft 43 is journaled in spaced alined roller bearings 44 and 45 suitably can ried by the machine frame. It will thus be evident that rotation of the armature shaft 15 will be transmitted to the pinion 16, gear 17, pinion 19, internal gear 20, friction clutch discs 28. 29, clutch member 23, shaft 25, pinion 37, gear 38, pinion 40, internal gear 41, to the shaft 43 to rotate the latter at a predetermined high or fast speed whenever the connect the clutch 28 29.

1 i r 1 1 r 1 hat this speed may 1e lowered at will by slipping the friction discs 28, 29 of the New referring specifically to the slow speed transmission, it will be noted that when the clutch operating member 35 is in inoperative position and the clutch 28, 29 is released, power *ili still be transmitted through the interlocking; member and the pinion 33 which is freely rotatable on the shaft T his pinion in turn meshes with gear 46 disposed coaz-zially with the gear and this gear has seen ed thereto and rotatable therewith a pinion 47 which meshes with a spur gear 48 disposed coaxially with and rotatable on the shaft 25. This gear 48 has secured thereto and rotatable therewith a spur pinion 49 which meshes with a spur 00 arranged coaxially with the gear 46 and this gear has secured thereto and rotatable therewith a spur pinion 51. The spur pinion 51 meshei-z with an internal gear 52 substantially similar to the internal gear 20. The internal gear 52 also houses a friction clutch substantially similar to the crutch heretofore described in connection with the clutch discs 28, 29 and this clutch includes series of interleaved clutch discs 53 and 54, certain of which are carried on a clutch member 55 keyed as at 56 to the shaft 25, while others are carried by a sleeve formed on the internal gear 52.

it clutch retaining member 57 is provided keyed as at 53 to the hub of the spur pinion 37 and this clutch member in this instance has no interlocking function and is only a disc retaining member. An axially movable cy lindrieal plane clutch operating member 59 surrounds the hub of the clutch member 57 and is provided with longitudinally extending fingers (50 which are adapted to engage the adjacent end disc of the clutch 53, 54. The clutch operating members and 59 may be operated alternatively to apply their respective clutches by means of suitable shipper mechanism which is clearly described in the pending application mentioned above and includes an operating handle 61 conveniently located at the rear end of the machine (see Figs. 1 and 2) As a result of this slow speei mechanism above described, although the clutch 28, 29 is disconnected, rotation will constantly be imparted through the pinion 33, gear 46, pinion 47, gear 48, pinion 49, gear 50, pinion 51, internal gear 52, clutch discs 53, 54, clutch member 55, pinion 37, gear 38, pinion 40, internal gear 41, to the shaft 43 so that'when the clutch 53, 54 is connected the shaft 43 will be rotated at a slow speed in an opposite direction or reverse direction from the fast feed previously described. Here it will also be evident that by slipping the friction discs 53, 54 of the slow speed clutch, this speed may be reduced at Will.

Thesha-ft'43 has secured .theretoat the rear v end thereof as by a key '67 ,1 a bevel pinion 68 which constantly meshes with larger bevel gears.69,'7O rotatably mounted onbearin .supported by a horizontal shaft T tdisposed transversely ofthe truck frame and journaled at its'o'pposite ends in ball bearings Y suitably carried by the-housing 66. Thebevel .gears 69, 7O rotatein opposite directions and constitute a reversing 'meeha'n'ism for" the shaft 7 1. Carried withi-ireach of the bevel gears 69, 70is a seriesof clutchdiscs 76 which is interleaved with. a: correspondingseries .of clutch discs 77 carried by each of the clutch,

7 housing members 78 keyed as at 79 to the I bevel gears into engagement with unmeacentend disc of the series of cluteh'di'sos 7 6, 77. As'shown, a roller equipped shipper yoke 82 is provided, the'rollers of which engage the adjacent plane surfaces of the clutch applying members80 and 81 and this shipper yoke is keyed to a vertically disposed shaft 83, suitably rotatably mounted within the.

housing66. The shaft 83 has secured thereto atits upper end an operating lever'84 (see Figs. 1 and 2). It will thus beevident that when the operator suitably swings the lever 84 about its pivot the shipper yoke. 82 is consequently swung and the desired clutch 76, 77 is appliedythereby connecting one or the other of the bevel gears 69; 70 in operative driving-relation with the shaft 74, rotating the'latter selectively in opposite directions. The shaft 74 may also be rotated at either a fast or at aslow speed under control of the clutches 28, 29 and 53, 54 described above under the control of the operating member 61.

In thisinstance, the shaft 'Mhas journaled thereon and connectible thereto a bevel gear 85. The mechanism for connecting the bevel gear 85 to the shaft 74; will be later described. The bevel gear 85 meshes with a-bevelgear 86 keyed as at87 to a horizontal shaft 88 extending longitudinally of the machine and disposed at one side thereof. The shaft 88 is disposed parallel with the shaft 13. The

forward end of the shaft 88 is journaled in a, sliding block 95, the latterbeing guided within an elongated horizontal slot 96 formed within the bracket 90. .Pivotally connected 100. The arm 100 is preferably composedof two parts held together by screws 101 (see F 1g. 5) and one of these parts has formed 7 -thereon a bent-up end portion102 to which sleeves 722,78, respectively, surrounding-Jane scription it will be evident that when the shafts? is connected indriving relation with the motor and when the shaft 'Mflis connected to o-neofthe bevel gears 69, 7 0, the screw 92 maybe rotated moving the nut 93 axially and consequently swinging the cutter bar at either a ftl5t 0l slow speed about its pivot. When the shaft '71 is connected to the other of the bevel gears 69, 70, the screw 92 may.

be rotated in anopposite direction at either a fast or at a slow speed and consequently the cutter bar may be swung about'itspivo-t in the opposite direction. a In specifically describing the improvec means for driving'the truck wheels from the motor of the machine 6, it will bev observed that secured to theshaft 7% opposite the bevel gear 85 as by akcy 109 is a clutch member 110. Arranged coaxial with the clutch member 110 is a clutch member 111 preferably formed integral with a shaft 112 alined with the shaft 741- and journaled in spaced alined ball bearings 113 suitably carried by the housing 66. The clutch member 111' is connectible in driving relation with the clutch member 110 by means of an axially movable internal shipper gear 114. As clearly shown in Fig. 3, theshaft 112 has secured thereto at its outer end a chain sprocket 115 which is connected by means of anendlessdrive chain .116 with'a sprocket-117 suitably rigidly secured to the rear truck axle. As shown in Figs. v1 and 2, the front and rear truck axles are connectedtogether by means of-a chain and sprocket connection 118. Again referring to" 3 it will be observed that the bevel gear 85 has preferably formed integral therewith at the outer end thereof a clutch member 119 which is'connectible by means of an axially movable internal shipper gear 119 to aclutch member 120 keyed as at 121'to the shaft 7 1. The mechanism for alternatively connecting the clutch members 111 and'119to the shaft 74. will now be described. Cooperating with the peripheral groovesin the internal shipper gears 114: and 119 respectively are shipper yokes 122 and123 secured as by pins 124 at the oppositeends of an actuating rod or shaft 125 slidably mounted, within bores 126 formed Within lateral lugs 127, the latter being formed integral with the housing As shown, longitudinally spaced stop pins are carried by the rod 125 and are adapted to alters-a tively engage the adjacent inner sides of the lugs 12?, thereby reventing c, movement of the shipper gears in eiolior direction. The rod 125 is vertically slotted tcrmediate its ends as at 129 and cooper, with this slot is a shipper lever 130 pi on the gear housing. It will thus be evident tiat when the lever 130 is grasped the operator and swung. about its pivot to effect axial movementof the rod 125 in one direction, the clutch members 110, 111 are connected by the shipper gear 114- while the clutch members 119, 120 are discomiected by the shipper gear 119. hen the shipper rod 125 is shifted axially in the opposite direction the clutch members 110, 111 are released and the clutch members 119, 120 are connected. It is obvious that the clutch members 111 and 119 may only be alternatively driven.

Suitably secured to the rear truck frictional braking device 135 (see and this braking device is adapted erated through suitable connections 13?, the rear end of the latter CUDIIQCLIOH be ing connected to an operating lever 138. This frictional braking device is adapted to con trol rotation of the truck wheels when the mining apparatus is moving over an inclined trackway and is also adapted to loch the truck wheels against rotation during the cutting operation.

In the operation of my improved shearing machine it will be noted that when the latter is moving rapidly about the mine the clutch 76, 7 7 is applied connecting the bevel gear 69 in driving relation with the shaft 7 1 and the clutch members 110 and 111 are connected by the clutch shipper gear 114:, it being understood that the motor is running and the fast speed clutch 28, 29 is applied and consequently the shaft 43 is rotated at a high speed. Then it is desired to drive the mining machine rearwardly along the trackway at a high speed, the bevel gear 69 is disconnected from the shaft 7 4 and the bevel gear 7 O is connected to the shaft by means of its controlling clutch 76, 77, and consequently the truck wheels are driven in an opposite direction. When the machine is disposed adjacent the working face the operator disconnects the bevel gear 70 from the shaft 741 and shifts the rod 125 axially, disconnecting the truck drive clutch members 110, 111 and connecting the bar swing clutch members 119, 120 in driving relation with the shaft 74 by means of the shipper gear 119. The clutch 7 6, 77 is then applied, connecting the bevel gear 69 and the shaft 7 1, it being understood that the shaft 43 is still rotating at a high speed. The screw 92 is consequently rotated at a fast speed and the nut 93 is moved rearwardly relative to the screw 92, consequently swinging the cutter bar 8 from the full line position shown in Fig. 1 to the upper dotted line position in that figure, the screw 92 thereafter being disconnected by means of shipper gear 119. The operator then suitably connects the cutter chain drive sprocket 10 to the motor and the cutter chain 9 is rapidly circulated about the outer edges of the cutter bar 8 in a usual manner. The rod 125 is then shifted axially disconnecting the bar swing clutch members 119, 120 and connecting the truck drive clutch members 110, 111. The fast speed clutch 28, 29 is then released and the slow speed clutch 53, 54 is applied, and the shaft 43 is consequently rotated in an opposite direction at a slow speed. The clutch 76, 77 is then applied connecting the bevel gear to the shaft 7 4: and the cutter bar 8 is then sumped into the coal, the apparatus moving bodily along the trackway at that time. After the sumping cut is completed the truck drive clutch members 110, 111 are disconnected and the bar swing clutch members 119 and 120 are connected, the bevel gear 69 disconnected from and bevel gear 70 connected to shaft 74, and the screw 92 is rotated at a slow speed moving the nut 93 forwardly axially relative to the screw 92 and consequently swinging the cutter bar 8 downwardly about its pivot to the dotted line position shown in Fig. 1. The gear 70 is then disconnected from the shaft- 74, the bar swing clutch members 119, 120 disconnected, and the truck drive clutch members 110, 111 are connected. The bevel gear 69 is then connected to the shaft 74 and consequently the cutter bar is withdrawn from the face at a cutting speed. The cutter bar is thereafter swung upwardly to the full line position shown in Fig. 1 and the machine is moved rearwardly at a high speed along the trackway and away from the working face. These and other operations and advantages of my improved shearing machine will be clearly apparent to those skilled in this art.

While I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism mounted thereon including a pivoted kerf cutter, a driving motor on said truck having its axis extending longitudinally of the apparatus, said cutting mechanism being driven from one end of said motor, constantly operative means connected to said kerf cutter and driven from the opposite end of said motor for swinging positively said kertcutter about its pivot'in opposite directions, said bar sw nging means: including a reciprocable element movable bodily in one irect on relative to said motor to eitect 'swlnglng of saidkerf cutter in one dlrectlon and movable bodily in the opposite direction relative to said motor to effect swinging of said kerfcutter in theopposite direction, and

mechanisintor propelling the apparatus bodlly. alongthemine trackway in opposite d1-' rections to V eliect opposite rectilineanmove ments of said kerf cutter at a cutting speed.

2. In a mining apparatus, a wheeled truck A adapted to run along a mine trackway, cutbeing driven from the front end of the motor,

constantly operative means connected to said 7 kerf cutter and driven from the rear end of said .motor for swinging positively said kert cutteraboutits pivot in opposite directions, said bar swinging means including a recip rocable element movable bodily in one direction relative to said motor toellect swinging otsaid keri": cutter in one direction and movable bodily in the opposite direction relative to said motor to eitect swinging of said kerf cutter in the opposite direction, and mechanism for propelling the apparatus bodily along the mine trackway in opposite directions to efi'ect opposite rectilinear movements otsaid kerf cutter at a cutting speech In a mining apparatus, a wheele'dtruck adapted to run along a mine trackway, cutting mechanism mounted thereon including a pivoted kert cutter, a driving motor'having its axis extending longitudinally of the apparatus, said cutting mechanism being driven from oneend oi said'moton means operatively connected to said kerf" cutter and driven from the opposite end of said motor "for swinging said kerf cutter about its pivot while the latter remains stationary includmg relatively rotatable screw and nut elements and connectlons between one of said elements and said kerf cutter, and mechanism for propelling the apparatus bodily inopposite directionsalong the mine trackway to eftect opposite rectilinear movements of said herf cutter at a cutting speed.

4;. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cut:

ting mechanism mounted thereon including. a pivoted. kert cutter, a driving motor having its axis extending longitudinally of the apparatus, said cutting mechanism being driven from the front end of said motor, means operatively connected to said kerf cutter and driven from the rear end of said motor for swinging said kert cutter about its pivot while the latterremains stationary including relatively rotatable screw and nutelements' and connections between one of said elements 7 an'dsaid keri' cutter, and mechanism'for propelling the apparatus bodilyv 1n oppos1te d1- reotions along the mine trackway to efiect opposite rectilinear movements of said kert cutter at a cutting speed c p 5. in a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism mounted thereon including a pirotedlrert' cutt r, a driving motor having. its axis extending longitudinally of the apparatus, said cutting mechanism being driven from one end of said motor, means operatively connected to'said lrerf cutter and driven from the opposite end of said motor for swinging said kerf cutter about its pivot while the latter remains stationary including relatively rotatable screw and nut elements, connections between one of said elements and said keri' cutter and means for rotating said screw, and mechanism for propelling the apparatus bodily in opposite directions along the mine trackway to effect opposite rectilinear movements of said 'kert cutter at a cutting speed. r

6. In amining apparatus, a wheeled true;

adapted to run along a mine trackway, cutting inechanism mounted thereon including a pivoted kert' cutter, a-driving motorrhaving its axis extendinglongitudinally of the paratus, said cutting mechanism 1 eing drive from the front end of said niotorgmea operatively connected to said lzer'f cutter and driven from the rear end of said motor for swinging said kerfcutter about its pivot while the la 'ter remains stationary including relatively rotatable, screw and nut elemen connections between one of said: elements and said kerf cutter and means for rotating said screw, and mechanism for propelling the apparatus bodily in opposite directions along the mine trackway to ffect opposite rectilinear movements of said kerf cutter at a cutting speed.

7. In a'mining apparatus, a wheeled truclt a pivoted lrerf cutter, a driving motor having its a extending longitudinally of the apparatus, said cutting mechanism being dri on from one end of said motor, means opera.- tively connected to said lrerf cutter and driven from the opposite end of said motor for swinging said lzerf cutter about its pivot while the latter remains stationary including relatively rotatable screw and nut elements, connections between one of said elements and said kert-cutter and means for rotating said screw selectively in opposite directions,-and mechanism for propelling the apparatus bodily in opposite directions along :heinine trackway to eilect opposite rectilinear movementsoif' said lrerf cutter at a cutting speed.

I S. In a mining apparatus, a wheeled truck tracltway, cutrcon including motor llil': m1" u vo mally of l, mg mechanism being drh end of said motor,

0 :oraeively connected to said kert cutter and riven from the rear end oi said motor tor swinging said kerf cut er bout pirot while the latter remains stationary including relatively rotatable screw and nut elements, connections between one of said elements and id lrerf cutter and means for rotating said w selectively in opposite directions, and y lanisni for prop g the apparatu" nearly in opposite dn-ec 2 dong the mine traclzway to GlliGCt opposite rectilinear move ments of said her; cutter at cutting speed, 9. In a mining apparatus, a wheeled trucle; adapter to run along a mine tracltway, cut.- ting mechanism mounted thereon incluc ii a pivoted lrert cutter, a drivir motor hai ing its axis extending longituui ally of the apparatus, said cutting mechanism being driven troni one end of said motor, means opcratively connected to said kert cutter an d driven from the opposite end of said motor for swinging said kerf cutte about its pivot while the latter remains stationary includin relatively rotatable screw and nut elements connections between one of said elements and said kert cutter and means for rotating screw selectively in opposite directions and at dillerent speeds, one mechanism for propelling the apparatus bodily in opposite directions along the mine trackway to eti'ez opposite rectilinear movements of said her; cutter at a cutting speed.

10. in a mining apparatus, a wheeled truck adapted to run along a mine trackway, c' z;- ting mechanism mounted thereon including a pivoted kert cutter, a driving motor havi its axis extending longitudinally of the a paratus, said cutting mechanism being driven from the front end of said motor, means operatively connected to said ker'l cutter and driven from the rear end of said motor tor swinging said lzerf cutter about its pivot while the latter remains stationary including elatively rotatable screw and nut elements,

connections between one oi said elements and said kerf cutter and means for rotating said screw selectively in opposite directions and at dii'l'erent speeds, and mechanism for propelling the apparatus bodily in opposite direct-ions along the mine traclcway to cll'ect opposite rectilinear movements of said keri cutter at a cutting speed.

11. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutthe opposite end of said motor and operatively connected to said kerf cutter for swinging said kerf cutter about its pivot while the latter remains stationary including cooperating relatively rotatable screw and nut elements supported along one side of the apparatus, and connections between one of said elements and said kerf cutter, and mechanism for propelling the apparatus bodily in opposite directions along the mine trackway to eii ect opposite rectilinear movements of said kert cutter at a cutting speed.

12. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted kerf cutter, a driving motor having its axis extending longitudinally of the apparatus, said cutting mechanism being driven from the front end of said motor, means driven from the rear end of said motor and operatively connected to said kerf cutter for swinging said kerf cutter about its pivot While the latter remains stationary including cooperating relatively rotatable screw and nut elements supported along one side of the apparatus, and connections between one of said elements and said kerf cutter, and mechanism for propelling the apparatus bodily in opposite directions along the mine trackway to effect opposite rectilinear movements of said kerf cutter at a cutting speed.

13. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted kerf cutter, a driving motor having its axis extending longitudinally of the apparatus, said cutting mechanism being driven from one end of said motor, means driven from the opposite end of said motor and operatively connected to said kerf cutter for swinging said kert cutter about its pivot while the latter remains stationary including cooperating relatively rotatable screw and nut elements supported along one side of the apparatus, connections between one of said elements and said kerx'i' cutter and means for rotating said screw, and mechanism for propelling the apparatus bodily in opposite directions along the mine trackway to effect opposite rectilinear movements of said kert cutter at a cutting speed.

14. In a minin apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted kerf cutter, a driving motor having its axis extending longitudinally of the apparatus, said cutting mechanism being driven from the front end of said motor, means driven from the rear end of said motor and operatively connected to said kerf cutter for swinging said kerf cutter about its pivot while the latter remains stationary including cooperating relatively rotatable screw and nut ele ments supported along one side of the apparatus, connections between one of said elementsand said kerf cutter and means for rotating said screw, and mechams'mfor propelling the apparatusbodily 1n opposlte directions along the mine traclrway to effect. OPPOSIJCG rectilinear moveinents of sand kerf.

extending longitudinally off the apparatus,

said cutting mechanism being driven from one end of said motor, means driven from the oppos te end of said motorand; operatively connected to said keri cutter for swinging said lrerf cutter about its pivot while the latter remains stationary including cooperating relatively rotatable screw and nut elements supported along'one side of the apparatus, connections between one of said elements and said her-f cutter and means tor-rotating said screw selectively in opposite directions, and mechanism for propelling the apparatus bodil in on osite directions alon the mine trackvvay to effectopposite rectilinear movemen ts of said kerf cutter at acutting speed.

16.; In a mining apparatus, awheeledtrucl: adapted to run along a mine trackway, cut ting mechanism thereonincluding a pivoted lrerf cutter, a driving motor having its axis extending longitudinally of the apparatus, said cutting. mechanism being driven from the front end of said motor, means driven from the rear end of said motor and operatively connected to said kerf cutter for swinging said keri cutter about its-pivot Whilethe latter remains stationary including cooperating relatively rotatable screw-and nut elements supported along oneside of the apparatus, connections betweenone ofsaid ele ments and said kerf cutter and means for rotating said screw selectively in opposite directions, and mechanism for propellingthe apparatus bodily in opposite directions along the mine trackway to effect opposite rectili- .iear movements of said kerf cutter at a cut ting speed.

1?. In a mining apparatus, a Wheeled truck adapted to run along a mine traclrway, cutting mechanism thereon including a pivoted kart cutter, a driving motor havingits axis extending longitudinally of the apparatus, said cntting inechanism being drivenfrom one end ot said motor, means driven tromthe opposite end of said motor and operatively connected to said lrerf cutter for swinging said herf cutter about its pivot whilelthe latter remains stationary including cooperating relatively rotatable screvrand nutelements supported along one side of the apparatus, connections between one of said elements and said lrer'f cutter and means for rotating said screw selectively in opposite directions and at di i erent speeds, and mechanism for pro-- m 5/9 4:11

the apparatus bodily in opposite directions along the mine trackwayto edect opposite rectilinear movements of said keri cutter at a cutting speed;

18. In a mining apparatus, adaptedto run alon a mine trackway, cutting mechanisi'n thereonflincluding a pivoted kert' cutter, a driving motorhaving its axis extending longitudinally of. the apparatus, said cutting mechanism being driven from the front end of said'motor, means driven from the rear end of said motor and operatively connected tosaid Keri cut er for swinging said lr'crf cutter about its pivot while the latterremains stationary including cooperating relatively rotatable screw and nut ole-1 ments supported along one side of the apparatus, connections between one of said ele' ments said ltert cutter andmeans for rot ng said screw selectively in opposite directions and diiierent speeds, and mechanism for propellin the apparatus bodily in oppo the mine trackway to of said site directions along eiiect oppo e rec iear movements heri cutter at a cutting speed.

19. in a mining apparatus, a wheeled truck adapted to run along mine trackway, cuttinginechanism thereon including a pivoted her-i cutter, motor having its axis extending ion 'itudinally of the apparatus and driving its forward end said'cutting mechanism, a p ural speed transmission mechanism operatively connected to the rear 'endfof said motor, constantly operative means driven by said transmission mechanism and including a reciprocable element connected to said keri cutterand reciprocable relative to the pivot ofthe latter and movable in opposite'directions at different speeds for positively swinging said her-i cutter about its pivotin opposite directions and at different speeds, and mechanism driven through said transmission n'iechanism, for driving the truck wheels to etlect bodily movement of the apparatus along the mine tracluvay at a cutting speed.

20. In a mining apparatus, a Wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted kerf cutter, a motor having its axis extending longitudinally of the apparatus and driving from its forward end said cutting mechanism, av plural, speed transmission mechanism operatively connected to the rear end of said motor, means operatively connected to said l'rert cutter and driven by said transmission mechanism for swinging said kerf cutter about itspivot While the la ter=remains stationary at different speeds. said swinging means including cooperating relatively rotat- Iable screw and nut elements and connections awheeled truck 21. In a mining apparatus, a

ng a pivoted herf cutter, motor having its niechai is r it connected to the rear able in opposite directions and at difiei to mr' t n d' ct arsh n nd n i x ALL A $3 no it. I a1 ill from its pivot for positively swinging said for driviu the true; wheels to pro ml the L: L

apparatus bodily along the mine traclrway in opposite directions during cutting.

22. In a mining apparatus, a wheeled truck adapted to run along a mine 't-racltway, cu"- ting mechanism thereon including a pivoted kerf cutter, a motor having its axis extending longitudinally of the apparatus and driving from ts forward end said cutting mechanism, a pl ral speed transmission mechanism operatively connected to the rear end of said motor and including a she 't rotatable in opposite directions and at different speeds, constantly operative means connected to said kerf cutter and driven by said shaft for imparting direct pushing and pulling forces to said hcrf cutter at a point offset from its pivot for positively swinging said kerf cutter about its pivot in opposite directions, sald herf cutter swinging means including a reciprocable element operatively connected to said kerf cutter and movable in opposite directions to effect swinging of said kerf cutter in opposite directions, and mechanism driven by said shaft for driving the truck wheels to propel the apparatus bodily along the mine trackway in opposite directions during cutting.

23. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted lterf cutter, a motor having its axis extending longitudinally of the apparatus and driving from its forward end said cutting mechanism, a plural speed transmission mechanism operatively connected to the rear end of said motor, means driven by said transmission mechanism for swinging said herf cutter about its pivot in opposite directions including cooperating relativel; rotatable nut and screw elements, means for rotating one of said elements for eifecting axial movement of the other element. and connections including a link pivotallv connected to said axially movable element and said kerf cutter, and mechanism for propelling the apparatus bodilv along the mine trackway to effect opposite rectilinear sumping and withdrawal movements of sai d lrerf cutter.

24. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted kerf cutter, a motor having its axis extending longitudinally of the apparatus and driving from its forward end said cutting mechanism, a plural speed transmission mechanism operatively connected to the rear end of said motor, means driven by said transmission mechanism for swinging said kerf cutter about its pivot in opposite directions including cooperat j relatively rotatable nut and screw element, means for rotating one of said elements for effecting axial movement of the other element, and connections including a link pivot-ally connected to said axially movable element and said kerf cutter, and mechanism driven through said transmission mechanism for propelling the apparatus bodily along the mine trackway to effect opposite rectilinear sumping and withdrawal movements of said kerf cutter.

25. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted lterf cutter, a motor having its axis extending longitudinally of the apparatus and driving from its forward end said cutting mechanism, mechanism driven from the rear end of said motor for swinging said kerf cutter about its pivot while the latter remains stationary including a shaft extending longitudinally of the apparatus at one side thereof, relatively rotatable screw and nut elements one of which is rotated by said shaft, and connections between said other element and said kerf cutter, and mechanism for propelling the apparatus bodily along the mine trackway in opposite directions to effect sumping and withdrawal. movements of said kerf cutter at a cutting speed.

26. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism thereon including a pivoted kerf cutter, a motor having its axis extending longitudinally of the apparatus and driving from its forward end said cutting mechanism, mechanism driven from the rear end of said motor for swinging said kerf cutter about its pivot while the latter remains stationary including a shaft extending longitudinally of the apparatus at one side thereof, relatively rotatable screw and nut elements one of which is rotated by said shaft, and connections between said other element and said kerf cutter, and mechanism driven from the rear end of said motor for propelling the apparatus bodily along the mine trackway in opposite directions to effect sumping and withdrawal movements of said kerf cutter at a cutting speed.

27. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism including a frame mounted ed on said frame for swinging movement rel-' ative thereto, a driving motor carried by said frame and having its axis extending longitudinally of the apparatus and driving from one end said cutting mechanism,- a plural speed transmission mechanism operatively connected to the opposite end ofsaid motor and having itste'rminal element rotatable on an axis extending longitudinally of the apparatus, constantly operative means connected to said kerf. cutter and driven through said transmission mechanism for positively swinging said kerf cutter about its pivot in opposite directions and at different speeds, said kerf cutter swinging means including a reciprocable element movable in one direction to eifect swinging of said kerf cutter in one-direction and movable in the opposite direction to efiect; swinging of said kerf cutter in the opposite direction, and mechanism driven through said transmission mechanism for driving the truck wheels to propel the apparatus bodily along the mine trackway to effect opposite rectilinear movements of said kerf cutter at a cutting speed.

28. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cuttinfl. mechanism including a frame mounted on and rigidly and permanently secured to said truck and a kerf cutter pivotally mountedon said frame for swinging movement relative thereto, a driving motor carried by said frame and having its axisextending longitudinally of the apparatus and driving from the front end said cutting mechanism, a plural speed transmission mechanism operatively connected to the rear end of said motor and having its terminal element rotatable on an axis extending longitudinally of the apparatus, constantly opera-- tive means connected to said kerf cutter and driven through said transmission mechanism for positively swinging said kerf cutter about its pivot in opposite directions and at different speeds, said kerf cutter swingingmeans including a reciprocable element movable in one direction to effect swinging'of said kerf cutter in one direction and movable in the opposite direction to effect swinging of said kerf cutter in the opposite'direction, and mechanism driven through said transmission mechanism for driving the truck wheels to propel the apparatus bodily along the mine trackway to effect opposite rectilinear movements of said kerf cutter at acutting speed.

29. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cutting mechanism including a frame mounted on and rigidly and permanently secured to said truck and a kerf cutter pivotally mounted on said frame for swinging movement relative thereto, a driving motor can ried by said frame and having its axis extending longitudinally of the apparatus and driving from one end said cutting mechanism, a plural speed transmission mecha nism operatively connected'to the opposite end of said motor and having its terminal element rotatable on an axis extending longitudinally of the apparatus, constantly operative means connected to said kerf cutter and driven through said transmission mechanism for positively swinging said'kerf cutter about its pivot in opposite directions and at diflerent speeds, said kerf cutter swinging means including cooperating relatively rotatable screw and nut elements and connections between one of said elements and said kerf cut tor, and mechanism driven through said transmission mechanism for driving the truck wheels to propel the apparatus bodily along the mine trackway to effect opposite rectilinear movements of said kerf cutter at a cutting speed.

, 30. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, cuttingmechanism including a frame mounted on and rigidly and permanently secured to said truck and a kerf cutter pivotally mounted on said frame for swinging movement relative thereto, a driving motor carried by said frame and having its axis extending longitudinally of the apparatus and driving from the front end said cutting mechanism, a plural speed transmission mechanism operatively connected to the rear end of said motor and having its terminal element rotatable on an axis extending longitudinally of the apparatus, constantly operative means connected to said kerf cutter and driven through said transmission mechanism for positively swinging said kerf cutter about its pivot in opposite directions and at difierentspeeds, said kerf cutterswinging means including cooperating relatively rotatable screw and nut elements and connections between one of said elements and said kerf cutter, and mechanism CHARLES F. OSG-OOD. 

